Puller device



Jan. 21,- 1958 F. NEUMEISTER, JR

FULLER DEVICE Filed May 16. '1955 INVENIOR. Fnapemcx NeummsTaRJR BYArms.

estates Patented Jan. 21, l58

FULLER DEVICE Frederick Nenmeister, in, Indianapolis, Ind. ApplicationMay 16, 1955, Serial No. 508,835 1 Claim. (Cl. 29-258) (Granted underTitle 35, U. S. Code (1952), sec. 266) The invention described hereinmay be manufactured and used by or for the Government of the UnitedStates of America for governmental purposes without the payment of anyroyalties thereon or therefor.

This invention relates to mechanical pullers and more particularly toseparable puller devices for pulling electronic equipment fromprotective containers in which said electronic equipment is cemented.While many puller devices are known for pulling various elements apart,these pullers are all used in their assembled condition and must beattached to the elements which they are pulling apart while in theassembled condition.

In the present invention the puller device is separable so that thepuller head may be detachably fixed to an element to be removed from acontainer, or the like. After the puller head is attached to the elementto be pulled, it can be reassembled with the remainder of the pullerdevice for the pulling operation. It is therefore a general object ofthis invention to provide a separable puller device for attachment to anelement to be pulled prior to the assembly of the device for the pullingoperation.

These and other objects, advantages, features, and uses will become moreapparent as the description proceeds when considered with theaccompanying drawing, in which:

Fig. l is a side elevational view of the assembled puller device withparts thereof shown broken away to disclose structural details;

Fig. 2 is a vertical sectional view taken along the line 2-2 and lookingin the direction of the arrows showing the inner wall detail of thepuller yoke; and

Fig. 3 is a bottom plan view of the puller head assembly.

Referring more particularly to Fig. 1, there is shown the assembledpuller device in which a U-shaped or yoke member is composed of a pairof side plates 11 and 12 held in parallel depending relation from a topplate 13 by cap screws 14. Substantially centrally through the top plate13 is threaded a threaded shaft 15 having a reduced diameter portion 16on the lower end thereof and a transverse opening 17 on the upper endthereof to accommodate a handle member 18. Slidable between the two sideelements 11 and 12 is a puller head assembly 20 rotatably journaled onthe reduced portion 16 of the threaded shaft 15 by the shoulders 21lying in the reduced portion 16 as will hereinafter be more specificallydescribed with reference to Fig. 3. The puller head assembly hasopenings therethrough through which cap screws 22 may extend forattachment to electronic equipment or other elements shown in phantom at23.

Referring more particularly to Fig. 2, the inner surface of each sidemember, side member 11 being shown, has a channel 25 extendingvertically thereof with a horizontal channel 26 connecting the lower endof channel 25 with the exterior. The side member 12 has correspondingchannels 25 and 26 therein, the channel 26 of both members 11 and 12being oriented in the same direction.

Referring more particularly to Figs. 1 and 3, the puller head assembly20 has laterally opposed pin projections 27 for slidable movementthrough the channels 25 and of the side members ii and 12. The shoulderportions 21 form the sides of a blind channel to permit the reduceddiameter portion 16 of the threaded stem 15 to slide through fordetachment of the puller head assembly 26 from the threaded stem A legportion or projection 28 is shown in each of the corners of the pullerhead assembly Zil for engagement with the electronic or other equipmentto be pulled. While the puller head assembly 2t) is shown herein ashaving four projections and openings therethrough for the insertion ofcap screws 22, it is to be understood that any number of openings andvarious contours on the underside of the puller head assembly may beused where desirable to match the surface of the elements to be pulled.In preparation for the pulling operation, the threaded shaft 15 may beturned to its lowermost position at which time the puller head 29assembly 29 may be withdrawn from the yoke 1t) and the shaft 15 byreason of the channels 26 and the blind shouldered channel 21. Thepuller head assembly can then be attached to the element to be pulledand the puller head assembly again slid into place in the yoke iii andon the shaft 15. The pulling operation may then proceed, the puller headassembly 20 being restricted to longitudinal movement by the channels25.

The figures shown herein are illustrative of the preferred embodiment ofthis invention although the puller device may take many forms. Forexample, multiple channels 25 and 26 with corresponding multiple pinprojections 27 may be used in a puller device, where desirable, andlikewise a plurality of threaded screws 15 may be used to pull heavyloads.

While many modifications and changes may be made in the constructionaldetails and features of this invention as illustrated, it is to beunderstood that I desire to be limited only to the scope of the appendedclaim.

I claim:

A mechanical puller device comprising; a U-shaped yoke member; athreaded shaft threaded through said yoke member substantially centrallyand parallel to the leg portions of said yoke member and having areduced diameter portion and a head means on the end within said yokemember; an L-shaped channel in the inner wall surface of each legportion with the base of the L lying near the outer extremity of eachleg portion and oriented in the same direction and with the vertical ofthe L lying longitudinally and substantially centrally of each legportion; and a puller head member having a pair of laterally extendingpin projections slidable in said L-shaped channels, having a blindshouldered channel in one face extending normal to a centerline throughsaid pin projections and terminating substantially centrally thereofslidable over said reduced diameter portion between said head means andthe end portion of said threaded shaft, and having threaded meansadaptable for holding an ele ment to be pulled against the other face,said puller head being slidably detachable from said yoke member andsaid threaded shaft in one extreme rotated position of said threadedshaft.

References Cited in the file of this patent UNITED STATES PATENTS 66,170Patterson June 25, 1867 218,877 Hanson Aug. 26, 1879 977,018 KopietzNov. 29, 1910 1,342,263 Goben June 1, 1920 1,354,390 Gilmore Sept. 28,1920 1,522,983 Strassner Jan. 13, 1925 1,565,776 Benedict "a-.. Dec. 15,1925

